See video example here: Watch Video on YouTube
My problem is that, in pose mode, when I'm in the Action Editor, the initial pose of the bone (that controls the lower cylinder of the excavator/construction vehicle) is off. It's not what the keyframe has it set as. Attempting to rotate the bone or move forward in the timeline, however, puts the bone back to its proper rotation. It's only when switching between Actions that this off-rotation issue appears. The problem is the issue is continuing into Unity, the game development program, and messing up the animations. My expected behavior of the bone is that it wouldn't glitch on the 1st frame of the Action when I switch between actions.
Here is a screenshot of the TrackTo constraint I have on this bone, targeting an object above it near the upper-cylinder:
Here's what the bone & cylinder should look like from starting frame:
Here's what it actually looks like when I switch between Actions (this glitch also carries into Unity):
Does anyone know how I can fix this problem? Any help would be greatly appreciated. Thank you!